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发明名称
摘要
PURPOSE:To call attention of train passengers on the platform in order to prevent accidents from occurring by installing a detector which informs train approach.
申请公布号
JPS555302(B2)
申请公布日期
1980.02.05
申请号
JP19750111493
申请日期
1975.09.12
申请人
发明人
分类号
B61L25/02;H04H20/00;H04H20/62;H04H60/07;H04R27/00
主分类号
B61L25/02
代理机构
代理人
主权项
地址
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